Toggle: While toggled on, Amumu will be surrounded by a small damaging area of tears. Enemies in the area will be dealt a percentage of their maximum health plus a base amount as magic damage each second.
Cost: 8 mana per second
Cooldown: 1 second
Radius of AoE: 300
Base Magic Damage: 8/12/16/20/24
Max Health to Damage Ratio: 1.5/1.8/2.1/2.4/2.7% (+0.01 per ability power)

Utility

Vision Ward

Can only carry 2 Vision Wards in inventory.
Click to Consume: Places a visible ward that reveals the surrounding area and invisible units in the area until killed. Limit 1 Vision Ward on the map per player.
(Revealing a ward in this manner grants a portion of the gold reward when that unit is killed.)